( CNN) At the UK's Observer newspaper, there was a picture on the wall that I revered and dreaded, when I ran there as a young gopher in London in the late 1990 s.

His picture hung near the elevator, a reminder of the ultimate cost the profession could impose on you.

Since then, the climate in which we work has changed. What got you killed was where you were, and what you were doing there. Now it can be what you say or write. Partly to blame is the slow weaponization of the news.

Trump says media a threat to national security